Annotation of src/usr.bin/ssh/readconf.c, Revision 1.220
1.220 ! millert 1: /* $OpenBSD: readconf.c,v 1.219 2014/04/23 12:42:34 djm Exp $ */
1.1 deraadt 2: /*
1.18 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for reading the configuration files.
1.26 markus 7: *
1.46 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.18 deraadt 13: */
1.1 deraadt 14:
1.147 stevesk 15: #include <sys/types.h>
16: #include <sys/stat.h>
1.152 stevesk 17: #include <sys/socket.h>
1.206 djm 18: #include <sys/wait.h>
1.220 ! millert 19: #include <sys/un.h>
1.152 stevesk 20:
21: #include <netinet/in.h>
1.190 djm 22: #include <netinet/in_systm.h>
23: #include <netinet/ip.h>
1.148 stevesk 24:
25: #include <ctype.h>
1.154 stevesk 26: #include <errno.h>
1.206 djm 27: #include <fcntl.h>
1.155 stevesk 28: #include <netdb.h>
1.206 djm 29: #include <paths.h>
30: #include <pwd.h>
1.159 deraadt 31: #include <signal.h>
1.158 stevesk 32: #include <stdio.h>
1.157 stevesk 33: #include <string.h>
1.156 stevesk 34: #include <unistd.h>
1.200 dtucker 35: #include <util.h>
1.1 deraadt 36:
1.159 deraadt 37: #include "xmalloc.h"
1.1 deraadt 38: #include "ssh.h"
1.25 markus 39: #include "compat.h"
1.58 markus 40: #include "cipher.h"
1.55 markus 41: #include "pathnames.h"
1.58 markus 42: #include "log.h"
1.159 deraadt 43: #include "key.h"
1.220 ! millert 44: #include "misc.h"
1.58 markus 45: #include "readconf.h"
46: #include "match.h"
1.159 deraadt 47: #include "buffer.h"
1.62 markus 48: #include "kex.h"
49: #include "mac.h"
1.206 djm 50: #include "uidswap.h"
1.1 deraadt 51:
52: /* Format of the configuration file:
53:
54: # Configuration data is parsed as follows:
55: # 1. command line options
56: # 2. user-specific file
57: # 3. system-wide file
58: # Any configuration value is only changed the first time it is set.
59: # Thus, host-specific definitions should be at the beginning of the
60: # configuration file, and defaults at the end.
61:
62: # Host-specific declarations. These may override anything above. A single
63: # host may match multiple declarations; these are processed in the order
64: # that they are given in.
65:
66: Host *.ngs.fi ngs.fi
1.96 markus 67: User foo
1.1 deraadt 68:
69: Host fake.com
70: HostName another.host.name.real.org
71: User blaah
72: Port 34289
73: ForwardX11 no
74: ForwardAgent no
75:
76: Host books.com
77: RemoteForward 9999 shadows.cs.hut.fi:9999
78: Cipher 3des
79:
80: Host fascist.blob.com
81: Port 23123
82: User tylonen
83: PasswordAuthentication no
84:
85: Host puukko.hut.fi
86: User t35124p
87: ProxyCommand ssh-proxy %h %p
88:
89: Host *.fr
1.96 markus 90: PublicKeyAuthentication no
1.1 deraadt 91:
92: Host *.su
93: Cipher none
94: PasswordAuthentication no
95:
1.144 reyk 96: Host vpn.fake.com
97: Tunnel yes
98: TunnelDevice 3
99:
1.1 deraadt 100: # Defaults for various options
101: Host *
102: ForwardAgent no
1.50 markus 103: ForwardX11 no
1.1 deraadt 104: PasswordAuthentication yes
105: RSAAuthentication yes
106: RhostsRSAAuthentication yes
107: StrictHostKeyChecking yes
1.126 markus 108: TcpKeepAlive no
1.1 deraadt 109: IdentityFile ~/.ssh/identity
110: Port 22
111: EscapeChar ~
112:
113: */
114:
115: /* Keyword tokens. */
116:
1.17 markus 117: typedef enum {
118: oBadOption,
1.206 djm 119: oHost, oMatch,
1.186 djm 120: oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout,
121: oGatewayPorts, oExitOnForwardFailure,
1.100 deraadt 122: oPasswordAuthentication, oRSAAuthentication,
1.59 markus 123: oChallengeResponseAuthentication, oXAuthLocation,
1.17 markus 124: oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward,
1.206 djm 125: oUser, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
1.17 markus 126: oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
127: oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
1.126 markus 128: oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts,
1.62 markus 129: oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs,
1.50 markus 130: oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
1.67 markus 131: oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias,
1.76 markus 132: oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication,
1.183 markus 133: oHostKeyAlgorithms, oBindAddress, oPKCS11Provider,
1.96 markus 134: oClearAllForwardings, oNoHostAuthenticationForLocalhost,
1.111 djm 135: oEnableSSHKeysign, oRekeyLimit, oVerifyHostKeyDNS, oConnectTimeout,
1.118 markus 136: oAddressFamily, oGssAuthentication, oGssDelegateCreds,
1.128 markus 137: oServerAliveInterval, oServerAliveCountMax, oIdentitiesOnly,
1.187 djm 138: oSendEnv, oControlPath, oControlMaster, oControlPersist,
139: oHashKnownHosts,
1.144 reyk 140: oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand,
1.216 djm 141: oVisualHostKey, oUseRoaming,
1.205 djm 142: oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass,
1.209 djm 143: oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots,
144: oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
1.220 ! millert 145: oStreamLocalBindMask, oStreamLocalBindUnlink,
1.199 djm 146: oIgnoredUnknownOption, oDeprecated, oUnsupported
1.1 deraadt 147: } OpCodes;
148:
149: /* Textual representations of the tokens. */
150:
1.17 markus 151: static struct {
152: const char *name;
153: OpCodes opcode;
154: } keywords[] = {
155: { "forwardagent", oForwardAgent },
156: { "forwardx11", oForwardX11 },
1.123 markus 157: { "forwardx11trusted", oForwardX11Trusted },
1.186 djm 158: { "forwardx11timeout", oForwardX11Timeout },
1.153 markus 159: { "exitonforwardfailure", oExitOnForwardFailure },
1.34 markus 160: { "xauthlocation", oXAuthLocation },
1.17 markus 161: { "gatewayports", oGatewayPorts },
162: { "useprivilegedport", oUsePrivilegedPort },
1.116 markus 163: { "rhostsauthentication", oDeprecated },
1.17 markus 164: { "passwordauthentication", oPasswordAuthentication },
1.48 markus 165: { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
166: { "kbdinteractivedevices", oKbdInteractiveDevices },
1.17 markus 167: { "rsaauthentication", oRSAAuthentication },
1.50 markus 168: { "pubkeyauthentication", oPubkeyAuthentication },
1.59 markus 169: { "dsaauthentication", oPubkeyAuthentication }, /* alias */
1.72 markus 170: { "rhostsrsaauthentication", oRhostsRSAAuthentication },
1.73 markus 171: { "hostbasedauthentication", oHostbasedAuthentication },
1.59 markus 172: { "challengeresponseauthentication", oChallengeResponseAuthentication },
173: { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
174: { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
1.110 jakob 175: { "kerberosauthentication", oUnsupported },
176: { "kerberostgtpassing", oUnsupported },
177: { "afstokenpassing", oUnsupported },
1.118 markus 178: #if defined(GSSAPI)
179: { "gssapiauthentication", oGssAuthentication },
180: { "gssapidelegatecredentials", oGssDelegateCreds },
181: #else
182: { "gssapiauthentication", oUnsupported },
183: { "gssapidelegatecredentials", oUnsupported },
184: #endif
1.96 markus 185: { "fallbacktorsh", oDeprecated },
186: { "usersh", oDeprecated },
1.17 markus 187: { "identityfile", oIdentityFile },
1.174 stevesk 188: { "identityfile2", oIdentityFile }, /* obsolete */
1.128 markus 189: { "identitiesonly", oIdentitiesOnly },
1.17 markus 190: { "hostname", oHostName },
1.52 markus 191: { "hostkeyalias", oHostKeyAlias },
1.17 markus 192: { "proxycommand", oProxyCommand },
193: { "port", oPort },
194: { "cipher", oCipher },
1.25 markus 195: { "ciphers", oCiphers },
1.62 markus 196: { "macs", oMacs },
1.25 markus 197: { "protocol", oProtocol },
1.17 markus 198: { "remoteforward", oRemoteForward },
199: { "localforward", oLocalForward },
200: { "user", oUser },
201: { "host", oHost },
1.206 djm 202: { "match", oMatch },
1.17 markus 203: { "escapechar", oEscapeChar },
204: { "globalknownhostsfile", oGlobalKnownHostsFile },
1.193 djm 205: { "globalknownhostsfile2", oDeprecated },
1.174 stevesk 206: { "userknownhostsfile", oUserKnownHostsFile },
1.193 djm 207: { "userknownhostsfile2", oDeprecated },
1.17 markus 208: { "connectionattempts", oConnectionAttempts },
209: { "batchmode", oBatchMode },
210: { "checkhostip", oCheckHostIP },
211: { "stricthostkeychecking", oStrictHostKeyChecking },
212: { "compression", oCompression },
213: { "compressionlevel", oCompressionLevel },
1.126 markus 214: { "tcpkeepalive", oTCPKeepAlive },
215: { "keepalive", oTCPKeepAlive }, /* obsolete */
1.17 markus 216: { "numberofpasswordprompts", oNumberOfPasswordPrompts },
217: { "loglevel", oLogLevel },
1.71 markus 218: { "dynamicforward", oDynamicForward },
1.67 markus 219: { "preferredauthentications", oPreferredAuthentications },
1.76 markus 220: { "hostkeyalgorithms", oHostKeyAlgorithms },
1.77 markus 221: { "bindaddress", oBindAddress },
1.183 markus 222: #ifdef ENABLE_PKCS11
223: { "smartcarddevice", oPKCS11Provider },
224: { "pkcs11provider", oPKCS11Provider },
1.110 jakob 225: #else
226: { "smartcarddevice", oUnsupported },
1.183 markus 227: { "pkcs11provider", oUnsupported },
1.110 jakob 228: #endif
1.93 deraadt 229: { "clearallforwardings", oClearAllForwardings },
1.101 markus 230: { "enablesshkeysign", oEnableSSHKeysign },
1.107 jakob 231: { "verifyhostkeydns", oVerifyHostKeyDNS },
1.93 deraadt 232: { "nohostauthenticationforlocalhost", oNoHostAuthenticationForLocalhost },
1.105 markus 233: { "rekeylimit", oRekeyLimit },
1.111 djm 234: { "connecttimeout", oConnectTimeout },
1.112 djm 235: { "addressfamily", oAddressFamily },
1.127 markus 236: { "serveraliveinterval", oServerAliveInterval },
237: { "serveralivecountmax", oServerAliveCountMax },
1.130 djm 238: { "sendenv", oSendEnv },
1.132 djm 239: { "controlpath", oControlPath },
240: { "controlmaster", oControlMaster },
1.187 djm 241: { "controlpersist", oControlPersist },
1.136 djm 242: { "hashknownhosts", oHashKnownHosts },
1.144 reyk 243: { "tunnel", oTunnel },
244: { "tunneldevice", oTunnelDevice },
245: { "localcommand", oLocalCommand },
246: { "permitlocalcommand", oPermitLocalCommand },
1.167 grunk 247: { "visualhostkey", oVisualHostKey },
1.177 andreas 248: { "useroaming", oUseRoaming },
1.189 djm 249: { "kexalgorithms", oKexAlgorithms },
1.190 djm 250: { "ipqos", oIPQoS },
1.192 djm 251: { "requesttty", oRequestTTY },
1.205 djm 252: { "proxyusefdpass", oProxyUseFdpass },
1.208 djm 253: { "canonicaldomains", oCanonicalDomains },
1.209 djm 254: { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal },
255: { "canonicalizehostname", oCanonicalizeHostname },
256: { "canonicalizemaxdots", oCanonicalizeMaxDots },
257: { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs },
1.220 ! millert 258: { "streamlocalbindmask", oStreamLocalBindMask },
! 259: { "streamlocalbindunlink", oStreamLocalBindUnlink },
1.199 djm 260: { "ignoreunknown", oIgnoreUnknown },
1.171 djm 261:
1.92 stevesk 262: { NULL, oBadOption }
1.13 markus 263: };
264:
1.19 markus 265: /*
266: * Adds a local TCP/IP port forward to options. Never returns if there is an
267: * error.
268: */
1.1 deraadt 269:
1.26 markus 270: void
1.220 ! millert 271: add_local_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 272: {
1.220 ! millert 273: struct Forward *fwd;
1.17 markus 274: extern uid_t original_real_uid;
1.185 djm 275:
1.220 ! millert 276: if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0 &&
! 277: newfwd->listen_path == NULL)
1.64 millert 278: fatal("Privileged ports can only be forwarded by root.");
1.185 djm 279: options->local_forwards = xrealloc(options->local_forwards,
280: options->num_local_forwards + 1,
281: sizeof(*options->local_forwards));
1.17 markus 282: fwd = &options->local_forwards[options->num_local_forwards++];
1.135 djm 283:
1.172 stevesk 284: fwd->listen_host = newfwd->listen_host;
1.135 djm 285: fwd->listen_port = newfwd->listen_port;
1.220 ! millert 286: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 287: fwd->connect_host = newfwd->connect_host;
1.135 djm 288: fwd->connect_port = newfwd->connect_port;
1.220 ! millert 289: fwd->connect_path = newfwd->connect_path;
1.1 deraadt 290: }
291:
1.19 markus 292: /*
293: * Adds a remote TCP/IP port forward to options. Never returns if there is
294: * an error.
295: */
1.1 deraadt 296:
1.26 markus 297: void
1.220 ! millert 298: add_remote_forward(Options *options, const struct Forward *newfwd)
1.1 deraadt 299: {
1.220 ! millert 300: struct Forward *fwd;
1.185 djm 301:
302: options->remote_forwards = xrealloc(options->remote_forwards,
303: options->num_remote_forwards + 1,
304: sizeof(*options->remote_forwards));
1.17 markus 305: fwd = &options->remote_forwards[options->num_remote_forwards++];
1.135 djm 306:
1.172 stevesk 307: fwd->listen_host = newfwd->listen_host;
1.135 djm 308: fwd->listen_port = newfwd->listen_port;
1.220 ! millert 309: fwd->listen_path = newfwd->listen_path;
1.172 stevesk 310: fwd->connect_host = newfwd->connect_host;
1.135 djm 311: fwd->connect_port = newfwd->connect_port;
1.220 ! millert 312: fwd->connect_path = newfwd->connect_path;
1.194 markus 313: fwd->handle = newfwd->handle;
1.184 markus 314: fwd->allocated_port = 0;
1.1 deraadt 315: }
316:
1.90 stevesk 317: static void
318: clear_forwardings(Options *options)
319: {
320: int i;
321:
1.135 djm 322: for (i = 0; i < options->num_local_forwards; i++) {
1.202 djm 323: free(options->local_forwards[i].listen_host);
1.220 ! millert 324: free(options->local_forwards[i].listen_path);
1.202 djm 325: free(options->local_forwards[i].connect_host);
1.220 ! millert 326: free(options->local_forwards[i].connect_path);
1.135 djm 327: }
1.185 djm 328: if (options->num_local_forwards > 0) {
1.202 djm 329: free(options->local_forwards);
1.185 djm 330: options->local_forwards = NULL;
331: }
1.90 stevesk 332: options->num_local_forwards = 0;
1.135 djm 333: for (i = 0; i < options->num_remote_forwards; i++) {
1.202 djm 334: free(options->remote_forwards[i].listen_host);
1.220 ! millert 335: free(options->remote_forwards[i].listen_path);
1.202 djm 336: free(options->remote_forwards[i].connect_host);
1.220 ! millert 337: free(options->remote_forwards[i].connect_path);
1.135 djm 338: }
1.185 djm 339: if (options->num_remote_forwards > 0) {
1.202 djm 340: free(options->remote_forwards);
1.185 djm 341: options->remote_forwards = NULL;
342: }
1.90 stevesk 343: options->num_remote_forwards = 0;
1.145 reyk 344: options->tun_open = SSH_TUNMODE_NO;
1.90 stevesk 345: }
346:
1.195 dtucker 347: void
348: add_identity_file(Options *options, const char *dir, const char *filename,
349: int userprovided)
350: {
351: char *path;
1.219 djm 352: int i;
1.195 dtucker 353:
354: if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
355: fatal("Too many identity files specified (max %d)",
356: SSH_MAX_IDENTITY_FILES);
357:
358: if (dir == NULL) /* no dir, filename is absolute */
359: path = xstrdup(filename);
360: else
361: (void)xasprintf(&path, "%.100s%.100s", dir, filename);
1.219 djm 362:
363: /* Avoid registering duplicates */
364: for (i = 0; i < options->num_identity_files; i++) {
365: if (options->identity_file_userprovided[i] == userprovided &&
366: strcmp(options->identity_files[i], path) == 0) {
367: debug2("%s: ignoring duplicate key %s", __func__, path);
368: free(path);
369: return;
370: }
371: }
1.195 dtucker 372:
373: options->identity_file_userprovided[options->num_identity_files] =
374: userprovided;
375: options->identity_files[options->num_identity_files++] = path;
376: }
377:
1.206 djm 378: int
379: default_ssh_port(void)
380: {
381: static int port;
382: struct servent *sp;
383:
384: if (port == 0) {
385: sp = getservbyname(SSH_SERVICE_NAME, "tcp");
386: port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
387: }
388: return port;
389: }
390:
391: /*
392: * Execute a command in a shell.
393: * Return its exit status or -1 on abnormal exit.
394: */
395: static int
396: execute_in_shell(const char *cmd)
397: {
398: char *shell, *command_string;
399: pid_t pid;
400: int devnull, status;
401: extern uid_t original_real_uid;
402:
403: if ((shell = getenv("SHELL")) == NULL)
404: shell = _PATH_BSHELL;
405:
406: /*
407: * Use "exec" to avoid "sh -c" processes on some platforms
408: * (e.g. Solaris)
409: */
410: xasprintf(&command_string, "exec %s", cmd);
411:
412: /* Need this to redirect subprocess stdin/out */
413: if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1)
414: fatal("open(/dev/null): %s", strerror(errno));
415:
416: debug("Executing command: '%.500s'", cmd);
417:
418: /* Fork and execute the command. */
419: if ((pid = fork()) == 0) {
420: char *argv[4];
421:
422: /* Child. Permanently give up superuser privileges. */
423: permanently_drop_suid(original_real_uid);
424:
425: /* Redirect child stdin and stdout. Leave stderr */
426: if (dup2(devnull, STDIN_FILENO) == -1)
427: fatal("dup2: %s", strerror(errno));
428: if (dup2(devnull, STDOUT_FILENO) == -1)
429: fatal("dup2: %s", strerror(errno));
430: if (devnull > STDERR_FILENO)
431: close(devnull);
432: closefrom(STDERR_FILENO + 1);
433:
434: argv[0] = shell;
435: argv[1] = "-c";
436: argv[2] = command_string;
437: argv[3] = NULL;
438:
439: execv(argv[0], argv);
440: error("Unable to execute '%.100s': %s", cmd, strerror(errno));
441: /* Die with signal to make this error apparent to parent. */
442: signal(SIGTERM, SIG_DFL);
443: kill(getpid(), SIGTERM);
444: _exit(1);
445: }
446: /* Parent. */
447: if (pid < 0)
448: fatal("%s: fork: %.100s", __func__, strerror(errno));
449:
450: close(devnull);
451: free(command_string);
452:
453: while (waitpid(pid, &status, 0) == -1) {
454: if (errno != EINTR && errno != EAGAIN)
455: fatal("%s: waitpid: %s", __func__, strerror(errno));
456: }
457: if (!WIFEXITED(status)) {
458: error("command '%.100s' exited abnormally", cmd);
459: return -1;
460: }
461: debug3("command returned status %d", WEXITSTATUS(status));
462: return WEXITSTATUS(status);
463: }
464:
465: /*
466: * Parse and execute a Match directive.
467: */
468: static int
469: match_cfg_line(Options *options, char **condition, struct passwd *pw,
470: const char *host_arg, const char *filename, int linenum)
471: {
1.211 djm 472: char *arg, *attrib, *cmd, *cp = *condition, *host;
473: const char *ruser;
1.213 dtucker 474: int r, port, result = 1, attributes = 0;
1.206 djm 475: size_t len;
476: char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
477:
478: /*
479: * Configuration is likely to be incomplete at this point so we
480: * must be prepared to use default values.
481: */
482: port = options->port <= 0 ? default_ssh_port() : options->port;
483: ruser = options->user == NULL ? pw->pw_name : options->user;
1.211 djm 484: if (options->hostname != NULL) {
1.212 djm 485: /* NB. Please keep in sync with ssh.c:main() */
1.211 djm 486: host = percent_expand(options->hostname,
487: "h", host_arg, (char *)NULL);
488: } else
489: host = xstrdup(host_arg);
1.206 djm 490:
491: debug3("checking match for '%s' host %s", cp, host);
492: while ((attrib = strdelim(&cp)) && *attrib != '\0') {
1.213 dtucker 493: attributes++;
494: if (strcasecmp(attrib, "all") == 0) {
495: if (attributes != 1 ||
496: ((arg = strdelim(&cp)) != NULL && *arg != '\0')) {
497: error("'all' cannot be combined with other "
498: "Match attributes");
499: result = -1;
500: goto out;
501: }
502: *condition = cp;
503: result = 1;
504: goto out;
505: }
1.206 djm 506: if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
507: error("Missing Match criteria for %s", attrib);
1.211 djm 508: result = -1;
509: goto out;
1.206 djm 510: }
511: len = strlen(arg);
512: if (strcasecmp(attrib, "host") == 0) {
513: if (match_hostname(host, arg, len) != 1)
514: result = 0;
515: else
516: debug("%.200s line %d: matched 'Host %.100s' ",
517: filename, linenum, host);
518: } else if (strcasecmp(attrib, "originalhost") == 0) {
519: if (match_hostname(host_arg, arg, len) != 1)
520: result = 0;
521: else
522: debug("%.200s line %d: matched "
523: "'OriginalHost %.100s' ",
524: filename, linenum, host_arg);
525: } else if (strcasecmp(attrib, "user") == 0) {
526: if (match_pattern_list(ruser, arg, len, 0) != 1)
527: result = 0;
528: else
529: debug("%.200s line %d: matched 'User %.100s' ",
530: filename, linenum, ruser);
531: } else if (strcasecmp(attrib, "localuser") == 0) {
532: if (match_pattern_list(pw->pw_name, arg, len, 0) != 1)
533: result = 0;
534: else
535: debug("%.200s line %d: matched "
536: "'LocalUser %.100s' ",
537: filename, linenum, pw->pw_name);
1.210 djm 538: } else if (strcasecmp(attrib, "exec") == 0) {
1.206 djm 539: if (gethostname(thishost, sizeof(thishost)) == -1)
540: fatal("gethostname: %s", strerror(errno));
541: strlcpy(shorthost, thishost, sizeof(shorthost));
542: shorthost[strcspn(thishost, ".")] = '\0';
543: snprintf(portstr, sizeof(portstr), "%d", port);
544:
545: cmd = percent_expand(arg,
546: "L", shorthost,
547: "d", pw->pw_dir,
548: "h", host,
549: "l", thishost,
550: "n", host_arg,
551: "p", portstr,
552: "r", ruser,
553: "u", pw->pw_name,
554: (char *)NULL);
1.217 djm 555: if (result != 1) {
556: /* skip execution if prior predicate failed */
557: debug("%.200s line %d: skipped exec \"%.100s\"",
1.206 djm 558: filename, linenum, cmd);
1.217 djm 559: } else {
560: r = execute_in_shell(cmd);
561: if (r == -1) {
562: fatal("%.200s line %d: match exec "
563: "'%.100s' error", filename,
564: linenum, cmd);
565: } else if (r == 0) {
566: debug("%.200s line %d: matched "
567: "'exec \"%.100s\"'", filename,
568: linenum, cmd);
569: } else {
570: debug("%.200s line %d: no match "
571: "'exec \"%.100s\"'", filename,
572: linenum, cmd);
573: result = 0;
574: }
575: }
1.206 djm 576: free(cmd);
577: } else {
578: error("Unsupported Match attribute %s", attrib);
1.211 djm 579: result = -1;
580: goto out;
1.206 djm 581: }
1.213 dtucker 582: }
583: if (attributes == 0) {
584: error("One or more attributes required for Match");
585: result = -1;
586: goto out;
1.206 djm 587: }
588: debug3("match %sfound", result ? "" : "not ");
589: *condition = cp;
1.211 djm 590: out:
591: free(host);
1.206 djm 592: return result;
593: }
594:
1.208 djm 595: /* Check and prepare a domain name: removes trailing '.' and lowercases */
596: static void
597: valid_domain(char *name, const char *filename, int linenum)
598: {
599: size_t i, l = strlen(name);
600: u_char c, last = '\0';
601:
602: if (l == 0)
603: fatal("%s line %d: empty hostname suffix", filename, linenum);
604: if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0]))
605: fatal("%s line %d: hostname suffix \"%.100s\" "
606: "starts with invalid character", filename, linenum, name);
607: for (i = 0; i < l; i++) {
608: c = tolower((u_char)name[i]);
609: name[i] = (char)c;
610: if (last == '.' && c == '.')
611: fatal("%s line %d: hostname suffix \"%.100s\" contains "
612: "consecutive separators", filename, linenum, name);
613: if (c != '.' && c != '-' && !isalnum(c) &&
614: c != '_') /* technically invalid, but common */
615: fatal("%s line %d: hostname suffix \"%.100s\" contains "
616: "invalid characters", filename, linenum, name);
617: last = c;
618: }
619: if (name[l - 1] == '.')
620: name[l - 1] = '\0';
621: }
622:
1.19 markus 623: /*
1.70 stevesk 624: * Returns the number of the token pointed to by cp or oBadOption.
1.19 markus 625: */
1.26 markus 626: static OpCodes
1.199 djm 627: parse_token(const char *cp, const char *filename, int linenum,
628: const char *ignored_unknown)
1.1 deraadt 629: {
1.199 djm 630: int i;
1.1 deraadt 631:
1.17 markus 632: for (i = 0; keywords[i].name; i++)
1.199 djm 633: if (strcmp(cp, keywords[i].name) == 0)
1.17 markus 634: return keywords[i].opcode;
1.199 djm 635: if (ignored_unknown != NULL && match_pattern_list(cp, ignored_unknown,
636: strlen(ignored_unknown), 1) == 1)
637: return oIgnoredUnknownOption;
1.75 stevesk 638: error("%s: line %d: Bad configuration option: %s",
639: filename, linenum, cp);
1.17 markus 640: return oBadOption;
1.1 deraadt 641: }
642:
1.207 djm 643: /* Multistate option parsing */
644: struct multistate {
645: char *key;
646: int value;
647: };
648: static const struct multistate multistate_flag[] = {
649: { "true", 1 },
650: { "false", 0 },
651: { "yes", 1 },
652: { "no", 0 },
653: { NULL, -1 }
654: };
655: static const struct multistate multistate_yesnoask[] = {
656: { "true", 1 },
657: { "false", 0 },
658: { "yes", 1 },
659: { "no", 0 },
660: { "ask", 2 },
661: { NULL, -1 }
662: };
663: static const struct multistate multistate_addressfamily[] = {
664: { "inet", AF_INET },
665: { "inet6", AF_INET6 },
666: { "any", AF_UNSPEC },
667: { NULL, -1 }
668: };
669: static const struct multistate multistate_controlmaster[] = {
670: { "true", SSHCTL_MASTER_YES },
671: { "yes", SSHCTL_MASTER_YES },
672: { "false", SSHCTL_MASTER_NO },
673: { "no", SSHCTL_MASTER_NO },
674: { "auto", SSHCTL_MASTER_AUTO },
675: { "ask", SSHCTL_MASTER_ASK },
676: { "autoask", SSHCTL_MASTER_AUTO_ASK },
677: { NULL, -1 }
678: };
679: static const struct multistate multistate_tunnel[] = {
680: { "ethernet", SSH_TUNMODE_ETHERNET },
681: { "point-to-point", SSH_TUNMODE_POINTOPOINT },
682: { "true", SSH_TUNMODE_DEFAULT },
683: { "yes", SSH_TUNMODE_DEFAULT },
684: { "false", SSH_TUNMODE_NO },
685: { "no", SSH_TUNMODE_NO },
686: { NULL, -1 }
687: };
688: static const struct multistate multistate_requesttty[] = {
689: { "true", REQUEST_TTY_YES },
690: { "yes", REQUEST_TTY_YES },
691: { "false", REQUEST_TTY_NO },
692: { "no", REQUEST_TTY_NO },
693: { "force", REQUEST_TTY_FORCE },
694: { "auto", REQUEST_TTY_AUTO },
695: { NULL, -1 }
696: };
1.209 djm 697: static const struct multistate multistate_canonicalizehostname[] = {
1.208 djm 698: { "true", SSH_CANONICALISE_YES },
699: { "false", SSH_CANONICALISE_NO },
700: { "yes", SSH_CANONICALISE_YES },
701: { "no", SSH_CANONICALISE_NO },
702: { "always", SSH_CANONICALISE_ALWAYS },
703: { NULL, -1 }
704: };
1.207 djm 705:
1.19 markus 706: /*
707: * Processes a single option line as used in the configuration files. This
708: * only sets those values that have not already been set.
709: */
1.102 markus 710: #define WHITESPACE " \t\r\n"
1.14 markus 711: int
1.206 djm 712: process_config_line(Options *options, struct passwd *pw, const char *host,
713: char *line, const char *filename, int linenum, int *activep, int userconfig)
1.1 deraadt 714: {
1.193 djm 715: char *s, **charptr, *endofnumber, *keyword, *arg, *arg2;
716: char **cpptr, fwdarg[256];
1.199 djm 717: u_int i, *uintptr, max_entries = 0;
1.206 djm 718: int negated, opcode, *intptr, value, value2, cmdline = 0;
1.164 dtucker 719: LogLevel *log_level_ptr;
1.201 dtucker 720: long long val64;
1.102 markus 721: size_t len;
1.220 ! millert 722: struct Forward fwd;
1.207 djm 723: const struct multistate *multistate_ptr;
1.208 djm 724: struct allowed_cname *cname;
1.106 djm 725:
1.206 djm 726: if (activep == NULL) { /* We are processing a command line directive */
727: cmdline = 1;
728: activep = &cmdline;
729: }
730:
1.106 djm 731: /* Strip trailing whitespace */
1.139 deraadt 732: for (len = strlen(line) - 1; len > 0; len--) {
1.106 djm 733: if (strchr(WHITESPACE, line[len]) == NULL)
734: break;
735: line[len] = '\0';
736: }
1.1 deraadt 737:
1.42 provos 738: s = line;
739: /* Get the keyword. (Each line is supposed to begin with a keyword). */
1.149 djm 740: if ((keyword = strdelim(&s)) == NULL)
741: return 0;
1.42 provos 742: /* Ignore leading whitespace. */
743: if (*keyword == '\0')
1.43 markus 744: keyword = strdelim(&s);
1.56 deraadt 745: if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
1.17 markus 746: return 0;
1.199 djm 747: /* Match lowercase keyword */
1.207 djm 748: lowercase(keyword);
1.17 markus 749:
1.199 djm 750: opcode = parse_token(keyword, filename, linenum,
751: options->ignored_unknown);
1.17 markus 752:
753: switch (opcode) {
754: case oBadOption:
1.19 markus 755: /* don't panic, but count bad options */
756: return -1;
1.17 markus 757: /* NOTREACHED */
1.199 djm 758: case oIgnoredUnknownOption:
759: debug("%s line %d: Ignored unknown option \"%s\"",
760: filename, linenum, keyword);
761: return 0;
1.111 djm 762: case oConnectTimeout:
763: intptr = &options->connection_timeout;
1.127 markus 764: parse_time:
1.111 djm 765: arg = strdelim(&s);
766: if (!arg || *arg == '\0')
767: fatal("%s line %d: missing time value.",
768: filename, linenum);
769: if ((value = convtime(arg)) == -1)
770: fatal("%s line %d: invalid time value.",
771: filename, linenum);
1.160 dtucker 772: if (*activep && *intptr == -1)
1.111 djm 773: *intptr = value;
774: break;
775:
1.17 markus 776: case oForwardAgent:
777: intptr = &options->forward_agent;
1.207 djm 778: parse_flag:
779: multistate_ptr = multistate_flag;
780: parse_multistate:
1.42 provos 781: arg = strdelim(&s);
1.40 ho 782: if (!arg || *arg == '\0')
1.207 djm 783: fatal("%s line %d: missing argument.",
784: filename, linenum);
785: value = -1;
786: for (i = 0; multistate_ptr[i].key != NULL; i++) {
787: if (strcasecmp(arg, multistate_ptr[i].key) == 0) {
788: value = multistate_ptr[i].value;
789: break;
790: }
791: }
792: if (value == -1)
793: fatal("%s line %d: unsupported option \"%s\".",
794: filename, linenum, arg);
1.17 markus 795: if (*activep && *intptr == -1)
796: *intptr = value;
797: break;
798:
799: case oForwardX11:
800: intptr = &options->forward_x11;
801: goto parse_flag;
802:
1.123 markus 803: case oForwardX11Trusted:
804: intptr = &options->forward_x11_trusted;
805: goto parse_flag;
1.186 djm 806:
807: case oForwardX11Timeout:
808: intptr = &options->forward_x11_timeout;
809: goto parse_time;
1.123 markus 810:
1.17 markus 811: case oGatewayPorts:
1.220 ! millert 812: intptr = &options->fwd_opts.gateway_ports;
1.17 markus 813: goto parse_flag;
814:
1.153 markus 815: case oExitOnForwardFailure:
816: intptr = &options->exit_on_forward_failure;
817: goto parse_flag;
818:
1.17 markus 819: case oUsePrivilegedPort:
820: intptr = &options->use_privileged_port;
821: goto parse_flag;
822:
823: case oPasswordAuthentication:
824: intptr = &options->password_authentication;
825: goto parse_flag;
826:
1.48 markus 827: case oKbdInteractiveAuthentication:
828: intptr = &options->kbd_interactive_authentication;
829: goto parse_flag;
830:
831: case oKbdInteractiveDevices:
832: charptr = &options->kbd_interactive_devices;
833: goto parse_string;
834:
1.50 markus 835: case oPubkeyAuthentication:
836: intptr = &options->pubkey_authentication;
1.30 markus 837: goto parse_flag;
838:
1.17 markus 839: case oRSAAuthentication:
840: intptr = &options->rsa_authentication;
841: goto parse_flag;
842:
843: case oRhostsRSAAuthentication:
844: intptr = &options->rhosts_rsa_authentication;
845: goto parse_flag;
846:
1.72 markus 847: case oHostbasedAuthentication:
848: intptr = &options->hostbased_authentication;
849: goto parse_flag;
850:
1.59 markus 851: case oChallengeResponseAuthentication:
1.78 markus 852: intptr = &options->challenge_response_authentication;
1.17 markus 853: goto parse_flag;
1.108 jakob 854:
1.118 markus 855: case oGssAuthentication:
856: intptr = &options->gss_authentication;
857: goto parse_flag;
858:
859: case oGssDelegateCreds:
860: intptr = &options->gss_deleg_creds;
861: goto parse_flag;
862:
1.17 markus 863: case oBatchMode:
864: intptr = &options->batch_mode;
865: goto parse_flag;
866:
867: case oCheckHostIP:
868: intptr = &options->check_host_ip;
1.167 grunk 869: goto parse_flag;
1.17 markus 870:
1.107 jakob 871: case oVerifyHostKeyDNS:
872: intptr = &options->verify_host_key_dns;
1.207 djm 873: multistate_ptr = multistate_yesnoask;
874: goto parse_multistate;
1.107 jakob 875:
1.17 markus 876: case oStrictHostKeyChecking:
877: intptr = &options->strict_host_key_checking;
1.207 djm 878: multistate_ptr = multistate_yesnoask;
879: goto parse_multistate;
1.17 markus 880:
881: case oCompression:
882: intptr = &options->compression;
883: goto parse_flag;
884:
1.126 markus 885: case oTCPKeepAlive:
886: intptr = &options->tcp_keep_alive;
1.17 markus 887: goto parse_flag;
888:
1.91 markus 889: case oNoHostAuthenticationForLocalhost:
890: intptr = &options->no_host_authentication_for_localhost;
891: goto parse_flag;
892:
1.17 markus 893: case oNumberOfPasswordPrompts:
894: intptr = &options->number_of_password_prompts;
895: goto parse_int;
896:
897: case oCompressionLevel:
898: intptr = &options->compression_level;
899: goto parse_int;
900:
1.105 markus 901: case oRekeyLimit:
902: arg = strdelim(&s);
903: if (!arg || *arg == '\0')
1.198 dtucker 904: fatal("%.200s line %d: Missing argument.", filename,
905: linenum);
906: if (strcmp(arg, "default") == 0) {
907: val64 = 0;
908: } else {
1.200 dtucker 909: if (scan_scaled(arg, &val64) == -1)
910: fatal("%.200s line %d: Bad number '%s': %s",
911: filename, linenum, arg, strerror(errno));
912: /* check for too-large or too-small limits */
913: if (val64 > UINT_MAX)
1.198 dtucker 914: fatal("%.200s line %d: RekeyLimit too large",
915: filename, linenum);
916: if (val64 != 0 && val64 < 16)
917: fatal("%.200s line %d: RekeyLimit too small",
918: filename, linenum);
1.105 markus 919: }
1.165 djm 920: if (*activep && options->rekey_limit == -1)
921: options->rekey_limit = (u_int32_t)val64;
1.198 dtucker 922: if (s != NULL) { /* optional rekey interval present */
923: if (strcmp(s, "none") == 0) {
924: (void)strdelim(&s); /* discard */
925: break;
926: }
927: intptr = &options->rekey_interval;
928: goto parse_time;
929: }
1.105 markus 930: break;
931:
1.17 markus 932: case oIdentityFile:
1.42 provos 933: arg = strdelim(&s);
1.40 ho 934: if (!arg || *arg == '\0')
1.17 markus 935: fatal("%.200s line %d: Missing argument.", filename, linenum);
936: if (*activep) {
1.50 markus 937: intptr = &options->num_identity_files;
1.27 markus 938: if (*intptr >= SSH_MAX_IDENTITY_FILES)
1.17 markus 939: fatal("%.200s line %d: Too many identity files specified (max %d).",
1.93 deraadt 940: filename, linenum, SSH_MAX_IDENTITY_FILES);
1.196 dtucker 941: add_identity_file(options, NULL, arg, userconfig);
1.17 markus 942: }
943: break;
944:
1.34 markus 945: case oXAuthLocation:
946: charptr=&options->xauth_location;
947: goto parse_string;
948:
1.17 markus 949: case oUser:
950: charptr = &options->user;
951: parse_string:
1.42 provos 952: arg = strdelim(&s);
1.40 ho 953: if (!arg || *arg == '\0')
1.193 djm 954: fatal("%.200s line %d: Missing argument.",
955: filename, linenum);
1.17 markus 956: if (*activep && *charptr == NULL)
1.38 provos 957: *charptr = xstrdup(arg);
1.17 markus 958: break;
959:
960: case oGlobalKnownHostsFile:
1.193 djm 961: cpptr = (char **)&options->system_hostfiles;
962: uintptr = &options->num_system_hostfiles;
963: max_entries = SSH_MAX_HOSTS_FILES;
964: parse_char_array:
965: if (*activep && *uintptr == 0) {
966: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
967: if ((*uintptr) >= max_entries)
968: fatal("%s line %d: "
969: "too many authorized keys files.",
970: filename, linenum);
971: cpptr[(*uintptr)++] = xstrdup(arg);
972: }
973: }
974: return 0;
1.17 markus 975:
976: case oUserKnownHostsFile:
1.193 djm 977: cpptr = (char **)&options->user_hostfiles;
978: uintptr = &options->num_user_hostfiles;
979: max_entries = SSH_MAX_HOSTS_FILES;
980: goto parse_char_array;
1.27 markus 981:
1.17 markus 982: case oHostName:
983: charptr = &options->hostname;
984: goto parse_string;
985:
1.52 markus 986: case oHostKeyAlias:
987: charptr = &options->host_key_alias;
988: goto parse_string;
989:
1.67 markus 990: case oPreferredAuthentications:
991: charptr = &options->preferred_authentications;
992: goto parse_string;
993:
1.77 markus 994: case oBindAddress:
995: charptr = &options->bind_address;
996: goto parse_string;
997:
1.183 markus 998: case oPKCS11Provider:
999: charptr = &options->pkcs11_provider;
1.86 markus 1000: goto parse_string;
1.85 jakob 1001:
1.17 markus 1002: case oProxyCommand:
1.144 reyk 1003: charptr = &options->proxy_command;
1004: parse_command:
1.113 markus 1005: if (s == NULL)
1006: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.102 markus 1007: len = strspn(s, WHITESPACE "=");
1.17 markus 1008: if (*activep && *charptr == NULL)
1.102 markus 1009: *charptr = xstrdup(s + len);
1.17 markus 1010: return 0;
1011:
1012: case oPort:
1013: intptr = &options->port;
1014: parse_int:
1.42 provos 1015: arg = strdelim(&s);
1.40 ho 1016: if (!arg || *arg == '\0')
1.17 markus 1017: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1018: if (arg[0] < '0' || arg[0] > '9')
1.17 markus 1019: fatal("%.200s line %d: Bad number.", filename, linenum);
1.21 markus 1020:
1021: /* Octal, decimal, or hex format? */
1.38 provos 1022: value = strtol(arg, &endofnumber, 0);
1023: if (arg == endofnumber)
1.21 markus 1024: fatal("%.200s line %d: Bad number.", filename, linenum);
1.17 markus 1025: if (*activep && *intptr == -1)
1026: *intptr = value;
1027: break;
1028:
1029: case oConnectionAttempts:
1030: intptr = &options->connection_attempts;
1031: goto parse_int;
1032:
1033: case oCipher:
1034: intptr = &options->cipher;
1.42 provos 1035: arg = strdelim(&s);
1.40 ho 1036: if (!arg || *arg == '\0')
1.32 markus 1037: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1038: value = cipher_number(arg);
1.17 markus 1039: if (value == -1)
1040: fatal("%.200s line %d: Bad cipher '%s'.",
1.93 deraadt 1041: filename, linenum, arg ? arg : "<NONE>");
1.17 markus 1042: if (*activep && *intptr == -1)
1043: *intptr = value;
1044: break;
1045:
1.25 markus 1046: case oCiphers:
1.42 provos 1047: arg = strdelim(&s);
1.40 ho 1048: if (!arg || *arg == '\0')
1.32 markus 1049: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1050: if (!ciphers_valid(arg))
1.31 markus 1051: fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
1.93 deraadt 1052: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1053: if (*activep && options->ciphers == NULL)
1.38 provos 1054: options->ciphers = xstrdup(arg);
1.25 markus 1055: break;
1056:
1.62 markus 1057: case oMacs:
1058: arg = strdelim(&s);
1059: if (!arg || *arg == '\0')
1060: fatal("%.200s line %d: Missing argument.", filename, linenum);
1061: if (!mac_valid(arg))
1062: fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.",
1.93 deraadt 1063: filename, linenum, arg ? arg : "<NONE>");
1.62 markus 1064: if (*activep && options->macs == NULL)
1065: options->macs = xstrdup(arg);
1066: break;
1067:
1.189 djm 1068: case oKexAlgorithms:
1069: arg = strdelim(&s);
1070: if (!arg || *arg == '\0')
1071: fatal("%.200s line %d: Missing argument.",
1072: filename, linenum);
1073: if (!kex_names_valid(arg))
1074: fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.",
1075: filename, linenum, arg ? arg : "<NONE>");
1076: if (*activep && options->kex_algorithms == NULL)
1077: options->kex_algorithms = xstrdup(arg);
1078: break;
1079:
1.76 markus 1080: case oHostKeyAlgorithms:
1081: arg = strdelim(&s);
1082: if (!arg || *arg == '\0')
1083: fatal("%.200s line %d: Missing argument.", filename, linenum);
1084: if (!key_names_valid2(arg))
1085: fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.",
1.93 deraadt 1086: filename, linenum, arg ? arg : "<NONE>");
1.76 markus 1087: if (*activep && options->hostkeyalgorithms == NULL)
1088: options->hostkeyalgorithms = xstrdup(arg);
1089: break;
1090:
1.25 markus 1091: case oProtocol:
1092: intptr = &options->protocol;
1.42 provos 1093: arg = strdelim(&s);
1.40 ho 1094: if (!arg || *arg == '\0')
1.32 markus 1095: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1096: value = proto_spec(arg);
1.25 markus 1097: if (value == SSH_PROTO_UNKNOWN)
1098: fatal("%.200s line %d: Bad protocol spec '%s'.",
1.93 deraadt 1099: filename, linenum, arg ? arg : "<NONE>");
1.25 markus 1100: if (*activep && *intptr == SSH_PROTO_UNKNOWN)
1101: *intptr = value;
1102: break;
1103:
1.17 markus 1104: case oLogLevel:
1.164 dtucker 1105: log_level_ptr = &options->log_level;
1.42 provos 1106: arg = strdelim(&s);
1.38 provos 1107: value = log_level_number(arg);
1.95 markus 1108: if (value == SYSLOG_LEVEL_NOT_SET)
1.64 millert 1109: fatal("%.200s line %d: unsupported log level '%s'",
1.93 deraadt 1110: filename, linenum, arg ? arg : "<NONE>");
1.164 dtucker 1111: if (*activep && *log_level_ptr == SYSLOG_LEVEL_NOT_SET)
1112: *log_level_ptr = (LogLevel) value;
1.17 markus 1113: break;
1114:
1.88 stevesk 1115: case oLocalForward:
1.17 markus 1116: case oRemoteForward:
1.168 stevesk 1117: case oDynamicForward:
1.42 provos 1118: arg = strdelim(&s);
1.135 djm 1119: if (arg == NULL || *arg == '\0')
1.88 stevesk 1120: fatal("%.200s line %d: Missing port argument.",
1121: filename, linenum);
1.135 djm 1122:
1.168 stevesk 1123: if (opcode == oLocalForward ||
1124: opcode == oRemoteForward) {
1125: arg2 = strdelim(&s);
1126: if (arg2 == NULL || *arg2 == '\0')
1127: fatal("%.200s line %d: Missing target argument.",
1128: filename, linenum);
1.135 djm 1129:
1.168 stevesk 1130: /* construct a string for parse_forward */
1131: snprintf(fwdarg, sizeof(fwdarg), "%s:%s", arg, arg2);
1132: } else if (opcode == oDynamicForward) {
1133: strlcpy(fwdarg, arg, sizeof(fwdarg));
1134: }
1135:
1136: if (parse_forward(&fwd, fwdarg,
1.176 djm 1137: opcode == oDynamicForward ? 1 : 0,
1138: opcode == oRemoteForward ? 1 : 0) == 0)
1.88 stevesk 1139: fatal("%.200s line %d: Bad forwarding specification.",
1140: filename, linenum);
1.135 djm 1141:
1.88 stevesk 1142: if (*activep) {
1.168 stevesk 1143: if (opcode == oLocalForward ||
1144: opcode == oDynamicForward)
1.135 djm 1145: add_local_forward(options, &fwd);
1.88 stevesk 1146: else if (opcode == oRemoteForward)
1.135 djm 1147: add_remote_forward(options, &fwd);
1.88 stevesk 1148: }
1.17 markus 1149: break;
1.71 markus 1150:
1.90 stevesk 1151: case oClearAllForwardings:
1152: intptr = &options->clear_forwardings;
1153: goto parse_flag;
1154:
1.17 markus 1155: case oHost:
1.206 djm 1156: if (cmdline)
1157: fatal("Host directive not supported as a command-line "
1158: "option");
1.17 markus 1159: *activep = 0;
1.191 djm 1160: arg2 = NULL;
1161: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1162: negated = *arg == '!';
1163: if (negated)
1164: arg++;
1.38 provos 1165: if (match_pattern(host, arg)) {
1.191 djm 1166: if (negated) {
1167: debug("%.200s line %d: Skipping Host "
1168: "block because of negated match "
1169: "for %.100s", filename, linenum,
1170: arg);
1171: *activep = 0;
1172: break;
1173: }
1174: if (!*activep)
1175: arg2 = arg; /* logged below */
1.17 markus 1176: *activep = 1;
1177: }
1.191 djm 1178: }
1179: if (*activep)
1180: debug("%.200s line %d: Applying options for %.100s",
1181: filename, linenum, arg2);
1.42 provos 1182: /* Avoid garbage check below, as strdelim is done. */
1.17 markus 1183: return 0;
1184:
1.206 djm 1185: case oMatch:
1186: if (cmdline)
1187: fatal("Host directive not supported as a command-line "
1188: "option");
1189: value = match_cfg_line(options, &s, pw, host,
1190: filename, linenum);
1191: if (value < 0)
1192: fatal("%.200s line %d: Bad Match condition", filename,
1193: linenum);
1194: *activep = value;
1195: break;
1196:
1.17 markus 1197: case oEscapeChar:
1198: intptr = &options->escape_char;
1.42 provos 1199: arg = strdelim(&s);
1.40 ho 1200: if (!arg || *arg == '\0')
1.17 markus 1201: fatal("%.200s line %d: Missing argument.", filename, linenum);
1.38 provos 1202: if (arg[0] == '^' && arg[2] == 0 &&
1.51 markus 1203: (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
1204: value = (u_char) arg[1] & 31;
1.38 provos 1205: else if (strlen(arg) == 1)
1.51 markus 1206: value = (u_char) arg[0];
1.38 provos 1207: else if (strcmp(arg, "none") == 0)
1.79 stevesk 1208: value = SSH_ESCAPECHAR_NONE;
1.17 markus 1209: else {
1210: fatal("%.200s line %d: Bad escape character.",
1.93 deraadt 1211: filename, linenum);
1.17 markus 1212: /* NOTREACHED */
1213: value = 0; /* Avoid compiler warning. */
1214: }
1215: if (*activep && *intptr == -1)
1216: *intptr = value;
1.112 djm 1217: break;
1218:
1219: case oAddressFamily:
1.114 djm 1220: intptr = &options->address_family;
1.207 djm 1221: multistate_ptr = multistate_addressfamily;
1222: goto parse_multistate;
1.17 markus 1223:
1.101 markus 1224: case oEnableSSHKeysign:
1225: intptr = &options->enable_ssh_keysign;
1226: goto parse_flag;
1227:
1.128 markus 1228: case oIdentitiesOnly:
1229: intptr = &options->identities_only;
1230: goto parse_flag;
1231:
1.127 markus 1232: case oServerAliveInterval:
1233: intptr = &options->server_alive_interval;
1234: goto parse_time;
1235:
1236: case oServerAliveCountMax:
1237: intptr = &options->server_alive_count_max;
1238: goto parse_int;
1239:
1.130 djm 1240: case oSendEnv:
1241: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1242: if (strchr(arg, '=') != NULL)
1243: fatal("%s line %d: Invalid environment name.",
1244: filename, linenum);
1.137 djm 1245: if (!*activep)
1246: continue;
1.130 djm 1247: if (options->num_send_env >= MAX_SEND_ENV)
1248: fatal("%s line %d: too many send env.",
1249: filename, linenum);
1250: options->send_env[options->num_send_env++] =
1251: xstrdup(arg);
1252: }
1253: break;
1254:
1.132 djm 1255: case oControlPath:
1256: charptr = &options->control_path;
1257: goto parse_string;
1258:
1259: case oControlMaster:
1260: intptr = &options->control_master;
1.207 djm 1261: multistate_ptr = multistate_controlmaster;
1262: goto parse_multistate;
1.132 djm 1263:
1.187 djm 1264: case oControlPersist:
1265: /* no/false/yes/true, or a time spec */
1266: intptr = &options->control_persist;
1267: arg = strdelim(&s);
1268: if (!arg || *arg == '\0')
1269: fatal("%.200s line %d: Missing ControlPersist"
1270: " argument.", filename, linenum);
1271: value = 0;
1272: value2 = 0; /* timeout */
1273: if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
1274: value = 0;
1275: else if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
1276: value = 1;
1277: else if ((value2 = convtime(arg)) >= 0)
1278: value = 1;
1279: else
1280: fatal("%.200s line %d: Bad ControlPersist argument.",
1281: filename, linenum);
1282: if (*activep && *intptr == -1) {
1283: *intptr = value;
1284: options->control_persist_timeout = value2;
1285: }
1286: break;
1287:
1.136 djm 1288: case oHashKnownHosts:
1289: intptr = &options->hash_known_hosts;
1290: goto parse_flag;
1291:
1.144 reyk 1292: case oTunnel:
1293: intptr = &options->tun_open;
1.207 djm 1294: multistate_ptr = multistate_tunnel;
1295: goto parse_multistate;
1.144 reyk 1296:
1297: case oTunnelDevice:
1298: arg = strdelim(&s);
1299: if (!arg || *arg == '\0')
1300: fatal("%.200s line %d: Missing argument.", filename, linenum);
1301: value = a2tun(arg, &value2);
1.145 reyk 1302: if (value == SSH_TUNID_ERR)
1.144 reyk 1303: fatal("%.200s line %d: Bad tun device.", filename, linenum);
1304: if (*activep) {
1305: options->tun_local = value;
1306: options->tun_remote = value2;
1307: }
1308: break;
1309:
1310: case oLocalCommand:
1311: charptr = &options->local_command;
1312: goto parse_command;
1313:
1314: case oPermitLocalCommand:
1315: intptr = &options->permit_local_command;
1316: goto parse_flag;
1317:
1.167 grunk 1318: case oVisualHostKey:
1319: intptr = &options->visual_host_key;
1320: goto parse_flag;
1321:
1.190 djm 1322: case oIPQoS:
1323: arg = strdelim(&s);
1324: if ((value = parse_ipqos(arg)) == -1)
1325: fatal("%s line %d: Bad IPQoS value: %s",
1326: filename, linenum, arg);
1327: arg = strdelim(&s);
1328: if (arg == NULL)
1329: value2 = value;
1330: else if ((value2 = parse_ipqos(arg)) == -1)
1331: fatal("%s line %d: Bad IPQoS value: %s",
1332: filename, linenum, arg);
1333: if (*activep) {
1334: options->ip_qos_interactive = value;
1335: options->ip_qos_bulk = value2;
1336: }
1337: break;
1338:
1.177 andreas 1339: case oUseRoaming:
1340: intptr = &options->use_roaming;
1341: goto parse_flag;
1342:
1.192 djm 1343: case oRequestTTY:
1344: intptr = &options->request_tty;
1.207 djm 1345: multistate_ptr = multistate_requesttty;
1346: goto parse_multistate;
1.192 djm 1347:
1.199 djm 1348: case oIgnoreUnknown:
1349: charptr = &options->ignored_unknown;
1350: goto parse_string;
1351:
1.205 djm 1352: case oProxyUseFdpass:
1353: intptr = &options->proxy_use_fdpass;
1354: goto parse_flag;
1355:
1.208 djm 1356: case oCanonicalDomains:
1357: value = options->num_canonical_domains != 0;
1358: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1359: valid_domain(arg, filename, linenum);
1360: if (!*activep || value)
1361: continue;
1362: if (options->num_canonical_domains >= MAX_CANON_DOMAINS)
1363: fatal("%s line %d: too many hostname suffixes.",
1364: filename, linenum);
1365: options->canonical_domains[
1366: options->num_canonical_domains++] = xstrdup(arg);
1367: }
1368: break;
1369:
1.209 djm 1370: case oCanonicalizePermittedCNAMEs:
1.208 djm 1371: value = options->num_permitted_cnames != 0;
1372: while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1373: /* Either '*' for everything or 'list:list' */
1374: if (strcmp(arg, "*") == 0)
1375: arg2 = arg;
1376: else {
1377: lowercase(arg);
1378: if ((arg2 = strchr(arg, ':')) == NULL ||
1379: arg2[1] == '\0') {
1380: fatal("%s line %d: "
1381: "Invalid permitted CNAME \"%s\"",
1382: filename, linenum, arg);
1383: }
1384: *arg2 = '\0';
1385: arg2++;
1386: }
1387: if (!*activep || value)
1388: continue;
1389: if (options->num_permitted_cnames >= MAX_CANON_DOMAINS)
1390: fatal("%s line %d: too many permitted CNAMEs.",
1391: filename, linenum);
1392: cname = options->permitted_cnames +
1393: options->num_permitted_cnames++;
1394: cname->source_list = xstrdup(arg);
1395: cname->target_list = xstrdup(arg2);
1396: }
1397: break;
1398:
1.209 djm 1399: case oCanonicalizeHostname:
1400: intptr = &options->canonicalize_hostname;
1401: multistate_ptr = multistate_canonicalizehostname;
1.208 djm 1402: goto parse_multistate;
1403:
1.209 djm 1404: case oCanonicalizeMaxDots:
1405: intptr = &options->canonicalize_max_dots;
1.208 djm 1406: goto parse_int;
1407:
1.209 djm 1408: case oCanonicalizeFallbackLocal:
1409: intptr = &options->canonicalize_fallback_local;
1.208 djm 1410: goto parse_flag;
1411:
1.220 ! millert 1412: case oStreamLocalBindMask:
! 1413: arg = strdelim(&s);
! 1414: if (!arg || *arg == '\0')
! 1415: fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum);
! 1416: /* Parse mode in octal format */
! 1417: value = strtol(arg, &endofnumber, 8);
! 1418: if (arg == endofnumber || value < 0 || value > 0777)
! 1419: fatal("%.200s line %d: Bad mask.", filename, linenum);
! 1420: options->fwd_opts.streamlocal_bind_mask = (mode_t)value;
! 1421: break;
! 1422:
! 1423: case oStreamLocalBindUnlink:
! 1424: intptr = &options->fwd_opts.streamlocal_bind_unlink;
! 1425: goto parse_flag;
! 1426:
1.96 markus 1427: case oDeprecated:
1.98 markus 1428: debug("%s line %d: Deprecated option \"%s\"",
1.96 markus 1429: filename, linenum, keyword);
1.98 markus 1430: return 0;
1.96 markus 1431:
1.110 jakob 1432: case oUnsupported:
1433: error("%s line %d: Unsupported option \"%s\"",
1434: filename, linenum, keyword);
1435: return 0;
1436:
1.17 markus 1437: default:
1438: fatal("process_config_line: Unimplemented opcode %d", opcode);
1439: }
1440:
1441: /* Check that there is no garbage at end of line. */
1.57 djm 1442: if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
1.39 ho 1443: fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
1.142 djm 1444: filename, linenum, arg);
1.39 ho 1445: }
1.17 markus 1446: return 0;
1.1 deraadt 1447: }
1448:
1449:
1.19 markus 1450: /*
1451: * Reads the config file and modifies the options accordingly. Options
1452: * should already be initialized before this call. This never returns if
1.89 stevesk 1453: * there is an error. If the file does not exist, this returns 0.
1.19 markus 1454: */
1.1 deraadt 1455:
1.89 stevesk 1456: int
1.206 djm 1457: read_config_file(const char *filename, struct passwd *pw, const char *host,
1458: Options *options, int flags)
1.1 deraadt 1459: {
1.17 markus 1460: FILE *f;
1461: char line[1024];
1462: int active, linenum;
1463: int bad_options = 0;
1464:
1.129 djm 1465: if ((f = fopen(filename, "r")) == NULL)
1.89 stevesk 1466: return 0;
1.129 djm 1467:
1.196 dtucker 1468: if (flags & SSHCONF_CHECKPERM) {
1.129 djm 1469: struct stat sb;
1.134 deraadt 1470:
1.131 dtucker 1471: if (fstat(fileno(f), &sb) == -1)
1.129 djm 1472: fatal("fstat %s: %s", filename, strerror(errno));
1473: if (((sb.st_uid != 0 && sb.st_uid != getuid()) ||
1.131 dtucker 1474: (sb.st_mode & 022) != 0))
1.129 djm 1475: fatal("Bad owner or permissions on %s", filename);
1476: }
1.17 markus 1477:
1478: debug("Reading configuration data %.200s", filename);
1479:
1.19 markus 1480: /*
1481: * Mark that we are now processing the options. This flag is turned
1482: * on/off by Host specifications.
1483: */
1.17 markus 1484: active = 1;
1485: linenum = 0;
1486: while (fgets(line, sizeof(line), f)) {
1487: /* Update line number counter. */
1488: linenum++;
1.206 djm 1489: if (process_config_line(options, pw, host, line, filename,
1490: linenum, &active, flags & SSHCONF_USERCONF) != 0)
1.17 markus 1491: bad_options++;
1492: }
1493: fclose(f);
1494: if (bad_options > 0)
1.64 millert 1495: fatal("%s: terminating, %d bad configuration options",
1.93 deraadt 1496: filename, bad_options);
1.89 stevesk 1497: return 1;
1.1 deraadt 1498: }
1499:
1.218 djm 1500: /* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
1501: int
1502: option_clear_or_none(const char *o)
1503: {
1504: return o == NULL || strcasecmp(o, "none") == 0;
1505: }
1506:
1.19 markus 1507: /*
1508: * Initializes options to special values that indicate that they have not yet
1509: * been set. Read_config_file will only set options with this value. Options
1510: * are processed in the following order: command line, user config file,
1511: * system config file. Last, fill_default_options is called.
1512: */
1.1 deraadt 1513:
1.26 markus 1514: void
1.17 markus 1515: initialize_options(Options * options)
1.1 deraadt 1516: {
1.17 markus 1517: memset(options, 'X', sizeof(*options));
1518: options->forward_agent = -1;
1519: options->forward_x11 = -1;
1.123 markus 1520: options->forward_x11_trusted = -1;
1.186 djm 1521: options->forward_x11_timeout = -1;
1.153 markus 1522: options->exit_on_forward_failure = -1;
1.34 markus 1523: options->xauth_location = NULL;
1.220 ! millert 1524: options->fwd_opts.gateway_ports = -1;
! 1525: options->fwd_opts.streamlocal_bind_mask = (mode_t)-1;
! 1526: options->fwd_opts.streamlocal_bind_unlink = -1;
1.17 markus 1527: options->use_privileged_port = -1;
1528: options->rsa_authentication = -1;
1.50 markus 1529: options->pubkey_authentication = -1;
1.78 markus 1530: options->challenge_response_authentication = -1;
1.118 markus 1531: options->gss_authentication = -1;
1532: options->gss_deleg_creds = -1;
1.17 markus 1533: options->password_authentication = -1;
1.48 markus 1534: options->kbd_interactive_authentication = -1;
1535: options->kbd_interactive_devices = NULL;
1.17 markus 1536: options->rhosts_rsa_authentication = -1;
1.72 markus 1537: options->hostbased_authentication = -1;
1.17 markus 1538: options->batch_mode = -1;
1539: options->check_host_ip = -1;
1540: options->strict_host_key_checking = -1;
1541: options->compression = -1;
1.126 markus 1542: options->tcp_keep_alive = -1;
1.17 markus 1543: options->compression_level = -1;
1544: options->port = -1;
1.114 djm 1545: options->address_family = -1;
1.17 markus 1546: options->connection_attempts = -1;
1.111 djm 1547: options->connection_timeout = -1;
1.17 markus 1548: options->number_of_password_prompts = -1;
1549: options->cipher = -1;
1.25 markus 1550: options->ciphers = NULL;
1.62 markus 1551: options->macs = NULL;
1.189 djm 1552: options->kex_algorithms = NULL;
1.76 markus 1553: options->hostkeyalgorithms = NULL;
1.25 markus 1554: options->protocol = SSH_PROTO_UNKNOWN;
1.17 markus 1555: options->num_identity_files = 0;
1556: options->hostname = NULL;
1.52 markus 1557: options->host_key_alias = NULL;
1.17 markus 1558: options->proxy_command = NULL;
1559: options->user = NULL;
1560: options->escape_char = -1;
1.193 djm 1561: options->num_system_hostfiles = 0;
1562: options->num_user_hostfiles = 0;
1.185 djm 1563: options->local_forwards = NULL;
1.17 markus 1564: options->num_local_forwards = 0;
1.185 djm 1565: options->remote_forwards = NULL;
1.17 markus 1566: options->num_remote_forwards = 0;
1.90 stevesk 1567: options->clear_forwardings = -1;
1.95 markus 1568: options->log_level = SYSLOG_LEVEL_NOT_SET;
1.67 markus 1569: options->preferred_authentications = NULL;
1.77 markus 1570: options->bind_address = NULL;
1.183 markus 1571: options->pkcs11_provider = NULL;
1.101 markus 1572: options->enable_ssh_keysign = - 1;
1.91 markus 1573: options->no_host_authentication_for_localhost = - 1;
1.128 markus 1574: options->identities_only = - 1;
1.105 markus 1575: options->rekey_limit = - 1;
1.198 dtucker 1576: options->rekey_interval = -1;
1.107 jakob 1577: options->verify_host_key_dns = -1;
1.127 markus 1578: options->server_alive_interval = -1;
1579: options->server_alive_count_max = -1;
1.130 djm 1580: options->num_send_env = 0;
1.132 djm 1581: options->control_path = NULL;
1582: options->control_master = -1;
1.187 djm 1583: options->control_persist = -1;
1584: options->control_persist_timeout = 0;
1.136 djm 1585: options->hash_known_hosts = -1;
1.144 reyk 1586: options->tun_open = -1;
1587: options->tun_local = -1;
1588: options->tun_remote = -1;
1589: options->local_command = NULL;
1590: options->permit_local_command = -1;
1.177 andreas 1591: options->use_roaming = -1;
1.167 grunk 1592: options->visual_host_key = -1;
1.190 djm 1593: options->ip_qos_interactive = -1;
1594: options->ip_qos_bulk = -1;
1.192 djm 1595: options->request_tty = -1;
1.205 djm 1596: options->proxy_use_fdpass = -1;
1.199 djm 1597: options->ignored_unknown = NULL;
1.208 djm 1598: options->num_canonical_domains = 0;
1599: options->num_permitted_cnames = 0;
1.209 djm 1600: options->canonicalize_max_dots = -1;
1601: options->canonicalize_fallback_local = -1;
1602: options->canonicalize_hostname = -1;
1.1 deraadt 1603: }
1604:
1.19 markus 1605: /*
1.218 djm 1606: * A petite version of fill_default_options() that just fills the options
1607: * needed for hostname canonicalization to proceed.
1608: */
1609: void
1610: fill_default_options_for_canonicalization(Options *options)
1611: {
1612: if (options->canonicalize_max_dots == -1)
1613: options->canonicalize_max_dots = 1;
1614: if (options->canonicalize_fallback_local == -1)
1615: options->canonicalize_fallback_local = 1;
1616: if (options->canonicalize_hostname == -1)
1617: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1618: }
1619:
1620: /*
1.19 markus 1621: * Called after processing other sources of option data, this fills those
1622: * options for which no value has been specified with their default values.
1623: */
1.26 markus 1624: void
1.17 markus 1625: fill_default_options(Options * options)
1.1 deraadt 1626: {
1.17 markus 1627: if (options->forward_agent == -1)
1.33 markus 1628: options->forward_agent = 0;
1.17 markus 1629: if (options->forward_x11 == -1)
1.23 markus 1630: options->forward_x11 = 0;
1.123 markus 1631: if (options->forward_x11_trusted == -1)
1632: options->forward_x11_trusted = 0;
1.186 djm 1633: if (options->forward_x11_timeout == -1)
1634: options->forward_x11_timeout = 1200;
1.153 markus 1635: if (options->exit_on_forward_failure == -1)
1636: options->exit_on_forward_failure = 0;
1.34 markus 1637: if (options->xauth_location == NULL)
1.80 markus 1638: options->xauth_location = _PATH_XAUTH;
1.220 ! millert 1639: if (options->fwd_opts.gateway_ports == -1)
! 1640: options->fwd_opts.gateway_ports = 0;
! 1641: if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1)
! 1642: options->fwd_opts.streamlocal_bind_mask = 0177;
! 1643: if (options->fwd_opts.streamlocal_bind_unlink == -1)
! 1644: options->fwd_opts.streamlocal_bind_unlink = 0;
1.17 markus 1645: if (options->use_privileged_port == -1)
1.65 markus 1646: options->use_privileged_port = 0;
1.17 markus 1647: if (options->rsa_authentication == -1)
1648: options->rsa_authentication = 1;
1.50 markus 1649: if (options->pubkey_authentication == -1)
1650: options->pubkey_authentication = 1;
1.78 markus 1651: if (options->challenge_response_authentication == -1)
1.83 markus 1652: options->challenge_response_authentication = 1;
1.118 markus 1653: if (options->gss_authentication == -1)
1.122 markus 1654: options->gss_authentication = 0;
1.118 markus 1655: if (options->gss_deleg_creds == -1)
1656: options->gss_deleg_creds = 0;
1.17 markus 1657: if (options->password_authentication == -1)
1658: options->password_authentication = 1;
1.48 markus 1659: if (options->kbd_interactive_authentication == -1)
1.59 markus 1660: options->kbd_interactive_authentication = 1;
1.17 markus 1661: if (options->rhosts_rsa_authentication == -1)
1.99 stevesk 1662: options->rhosts_rsa_authentication = 0;
1.72 markus 1663: if (options->hostbased_authentication == -1)
1664: options->hostbased_authentication = 0;
1.17 markus 1665: if (options->batch_mode == -1)
1666: options->batch_mode = 0;
1667: if (options->check_host_ip == -1)
1668: options->check_host_ip = 1;
1669: if (options->strict_host_key_checking == -1)
1670: options->strict_host_key_checking = 2; /* 2 is default */
1671: if (options->compression == -1)
1672: options->compression = 0;
1.126 markus 1673: if (options->tcp_keep_alive == -1)
1674: options->tcp_keep_alive = 1;
1.17 markus 1675: if (options->compression_level == -1)
1676: options->compression_level = 6;
1677: if (options->port == -1)
1678: options->port = 0; /* Filled in ssh_connect. */
1.114 djm 1679: if (options->address_family == -1)
1680: options->address_family = AF_UNSPEC;
1.17 markus 1681: if (options->connection_attempts == -1)
1.84 markus 1682: options->connection_attempts = 1;
1.17 markus 1683: if (options->number_of_password_prompts == -1)
1684: options->number_of_password_prompts = 3;
1685: /* Selected in ssh_login(). */
1686: if (options->cipher == -1)
1687: options->cipher = SSH_CIPHER_NOT_SET;
1.31 markus 1688: /* options->ciphers, default set in myproposals.h */
1.62 markus 1689: /* options->macs, default set in myproposals.h */
1.189 djm 1690: /* options->kex_algorithms, default set in myproposals.h */
1.76 markus 1691: /* options->hostkeyalgorithms, default set in myproposals.h */
1.25 markus 1692: if (options->protocol == SSH_PROTO_UNKNOWN)
1.178 markus 1693: options->protocol = SSH_PROTO_2;
1.17 markus 1694: if (options->num_identity_files == 0) {
1.50 markus 1695: if (options->protocol & SSH_PROTO_1) {
1.195 dtucker 1696: add_identity_file(options, "~/",
1697: _PATH_SSH_CLIENT_IDENTITY, 0);
1.50 markus 1698: }
1699: if (options->protocol & SSH_PROTO_2) {
1.195 dtucker 1700: add_identity_file(options, "~/",
1701: _PATH_SSH_CLIENT_ID_RSA, 0);
1702: add_identity_file(options, "~/",
1703: _PATH_SSH_CLIENT_ID_DSA, 0);
1704: add_identity_file(options, "~/",
1705: _PATH_SSH_CLIENT_ID_ECDSA, 0);
1.215 markus 1706: add_identity_file(options, "~/",
1707: _PATH_SSH_CLIENT_ID_ED25519, 0);
1.50 markus 1708: }
1.27 markus 1709: }
1.17 markus 1710: if (options->escape_char == -1)
1711: options->escape_char = '~';
1.193 djm 1712: if (options->num_system_hostfiles == 0) {
1713: options->system_hostfiles[options->num_system_hostfiles++] =
1714: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE);
1715: options->system_hostfiles[options->num_system_hostfiles++] =
1716: xstrdup(_PATH_SSH_SYSTEM_HOSTFILE2);
1717: }
1718: if (options->num_user_hostfiles == 0) {
1719: options->user_hostfiles[options->num_user_hostfiles++] =
1720: xstrdup(_PATH_SSH_USER_HOSTFILE);
1721: options->user_hostfiles[options->num_user_hostfiles++] =
1722: xstrdup(_PATH_SSH_USER_HOSTFILE2);
1723: }
1.95 markus 1724: if (options->log_level == SYSLOG_LEVEL_NOT_SET)
1.54 markus 1725: options->log_level = SYSLOG_LEVEL_INFO;
1.90 stevesk 1726: if (options->clear_forwardings == 1)
1727: clear_forwardings(options);
1.91 markus 1728: if (options->no_host_authentication_for_localhost == - 1)
1729: options->no_host_authentication_for_localhost = 0;
1.128 markus 1730: if (options->identities_only == -1)
1731: options->identities_only = 0;
1.101 markus 1732: if (options->enable_ssh_keysign == -1)
1733: options->enable_ssh_keysign = 0;
1.105 markus 1734: if (options->rekey_limit == -1)
1735: options->rekey_limit = 0;
1.198 dtucker 1736: if (options->rekey_interval == -1)
1737: options->rekey_interval = 0;
1.107 jakob 1738: if (options->verify_host_key_dns == -1)
1739: options->verify_host_key_dns = 0;
1.127 markus 1740: if (options->server_alive_interval == -1)
1741: options->server_alive_interval = 0;
1742: if (options->server_alive_count_max == -1)
1743: options->server_alive_count_max = 3;
1.132 djm 1744: if (options->control_master == -1)
1745: options->control_master = 0;
1.187 djm 1746: if (options->control_persist == -1) {
1747: options->control_persist = 0;
1748: options->control_persist_timeout = 0;
1749: }
1.136 djm 1750: if (options->hash_known_hosts == -1)
1751: options->hash_known_hosts = 0;
1.144 reyk 1752: if (options->tun_open == -1)
1.145 reyk 1753: options->tun_open = SSH_TUNMODE_NO;
1754: if (options->tun_local == -1)
1755: options->tun_local = SSH_TUNID_ANY;
1756: if (options->tun_remote == -1)
1757: options->tun_remote = SSH_TUNID_ANY;
1.144 reyk 1758: if (options->permit_local_command == -1)
1759: options->permit_local_command = 0;
1.177 andreas 1760: if (options->use_roaming == -1)
1761: options->use_roaming = 1;
1.167 grunk 1762: if (options->visual_host_key == -1)
1763: options->visual_host_key = 0;
1.190 djm 1764: if (options->ip_qos_interactive == -1)
1765: options->ip_qos_interactive = IPTOS_LOWDELAY;
1766: if (options->ip_qos_bulk == -1)
1767: options->ip_qos_bulk = IPTOS_THROUGHPUT;
1.192 djm 1768: if (options->request_tty == -1)
1769: options->request_tty = REQUEST_TTY_AUTO;
1.205 djm 1770: if (options->proxy_use_fdpass == -1)
1771: options->proxy_use_fdpass = 0;
1.209 djm 1772: if (options->canonicalize_max_dots == -1)
1773: options->canonicalize_max_dots = 1;
1774: if (options->canonicalize_fallback_local == -1)
1775: options->canonicalize_fallback_local = 1;
1776: if (options->canonicalize_hostname == -1)
1777: options->canonicalize_hostname = SSH_CANONICALISE_NO;
1.207 djm 1778: #define CLEAR_ON_NONE(v) \
1779: do { \
1.218 djm 1780: if (option_clear_or_none(v)) { \
1.207 djm 1781: free(v); \
1782: v = NULL; \
1783: } \
1784: } while(0)
1785: CLEAR_ON_NONE(options->local_command);
1786: CLEAR_ON_NONE(options->proxy_command);
1787: CLEAR_ON_NONE(options->control_path);
1.17 markus 1788: /* options->user will be set in the main program if appropriate */
1789: /* options->hostname will be set in the main program if appropriate */
1.52 markus 1790: /* options->host_key_alias should not be set by default */
1.67 markus 1791: /* options->preferred_authentications will be set in ssh */
1.135 djm 1792: }
1793:
1.220 ! millert 1794: struct fwdarg {
! 1795: char *arg;
! 1796: int ispath;
! 1797: };
! 1798:
! 1799: /*
! 1800: * parse_fwd_field
! 1801: * parses the next field in a port forwarding specification.
! 1802: * sets fwd to the parsed field and advances p past the colon
! 1803: * or sets it to NULL at end of string.
! 1804: * returns 0 on success, else non-zero.
! 1805: */
! 1806: static int
! 1807: parse_fwd_field(char **p, struct fwdarg *fwd)
! 1808: {
! 1809: char *ep, *cp = *p;
! 1810: int ispath = 0;
! 1811:
! 1812: if (*cp == '\0') {
! 1813: *p = NULL;
! 1814: return -1; /* end of string */
! 1815: }
! 1816:
! 1817: /*
! 1818: * A field escaped with square brackets is used literally.
! 1819: * XXX - allow ']' to be escaped via backslash?
! 1820: */
! 1821: if (*cp == '[') {
! 1822: /* find matching ']' */
! 1823: for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) {
! 1824: if (*ep == '/')
! 1825: ispath = 1;
! 1826: }
! 1827: /* no matching ']' or not at end of field. */
! 1828: if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0'))
! 1829: return -1;
! 1830: /* NUL terminate the field and advance p past the colon */
! 1831: *ep++ = '\0';
! 1832: if (*ep != '\0')
! 1833: *ep++ = '\0';
! 1834: fwd->arg = cp + 1;
! 1835: fwd->ispath = ispath;
! 1836: *p = ep;
! 1837: return 0;
! 1838: }
! 1839:
! 1840: for (cp = *p; *cp != '\0'; cp++) {
! 1841: switch (*cp) {
! 1842: case '\\':
! 1843: memmove(cp, cp + 1, strlen(cp + 1) + 1);
! 1844: cp++;
! 1845: break;
! 1846: case '/':
! 1847: ispath = 1;
! 1848: break;
! 1849: case ':':
! 1850: *cp++ = '\0';
! 1851: goto done;
! 1852: }
! 1853: }
! 1854: done:
! 1855: fwd->arg = *p;
! 1856: fwd->ispath = ispath;
! 1857: *p = cp;
! 1858: return 0;
! 1859: }
! 1860:
1.135 djm 1861: /*
1862: * parse_forward
1863: * parses a string containing a port forwarding specification of the form:
1.168 stevesk 1864: * dynamicfwd == 0
1.220 ! millert 1865: * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath
! 1866: * listenpath:connectpath
1.168 stevesk 1867: * dynamicfwd == 1
1868: * [listenhost:]listenport
1.135 djm 1869: * returns number of arguments parsed or zero on error
1870: */
1871: int
1.220 ! millert 1872: parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd)
1.135 djm 1873: {
1.220 ! millert 1874: struct fwdarg fwdargs[4];
! 1875: char *p, *cp;
1.135 djm 1876: int i;
1877:
1.220 ! millert 1878: memset(fwd, 0, sizeof(*fwd));
! 1879: memset(fwdargs, 0, sizeof(fwdargs));
1.135 djm 1880:
1881: cp = p = xstrdup(fwdspec);
1882:
1883: /* skip leading spaces */
1.214 deraadt 1884: while (isspace((u_char)*cp))
1.135 djm 1885: cp++;
1886:
1.220 ! millert 1887: for (i = 0; i < 4; ++i) {
! 1888: if (parse_fwd_field(&cp, &fwdargs[i]) != 0)
1.135 djm 1889: break;
1.220 ! millert 1890: }
1.135 djm 1891:
1.170 stevesk 1892: /* Check for trailing garbage */
1.220 ! millert 1893: if (cp != NULL && *cp != '\0') {
1.135 djm 1894: i = 0; /* failure */
1.220 ! millert 1895: }
1.135 djm 1896:
1897: switch (i) {
1.168 stevesk 1898: case 1:
1.220 ! millert 1899: if (fwdargs[0].ispath) {
! 1900: fwd->listen_path = xstrdup(fwdargs[0].arg);
! 1901: fwd->listen_port = PORT_STREAMLOCAL;
! 1902: } else {
! 1903: fwd->listen_host = NULL;
! 1904: fwd->listen_port = a2port(fwdargs[0].arg);
! 1905: }
1.168 stevesk 1906: fwd->connect_host = xstrdup("socks");
1907: break;
1908:
1909: case 2:
1.220 ! millert 1910: if (fwdargs[0].ispath && fwdargs[1].ispath) {
! 1911: fwd->listen_path = xstrdup(fwdargs[0].arg);
! 1912: fwd->listen_port = PORT_STREAMLOCAL;
! 1913: fwd->connect_path = xstrdup(fwdargs[1].arg);
! 1914: fwd->connect_port = PORT_STREAMLOCAL;
! 1915: } else if (fwdargs[1].ispath) {
! 1916: fwd->listen_host = NULL;
! 1917: fwd->listen_port = a2port(fwdargs[0].arg);
! 1918: fwd->connect_path = xstrdup(fwdargs[1].arg);
! 1919: fwd->connect_port = PORT_STREAMLOCAL;
! 1920: } else {
! 1921: fwd->listen_host = xstrdup(fwdargs[0].arg);
! 1922: fwd->listen_port = a2port(fwdargs[1].arg);
! 1923: fwd->connect_host = xstrdup("socks");
! 1924: }
1.168 stevesk 1925: break;
1926:
1.135 djm 1927: case 3:
1.220 ! millert 1928: if (fwdargs[0].ispath) {
! 1929: fwd->listen_path = xstrdup(fwdargs[0].arg);
! 1930: fwd->listen_port = PORT_STREAMLOCAL;
! 1931: fwd->connect_host = xstrdup(fwdargs[1].arg);
! 1932: fwd->connect_port = a2port(fwdargs[2].arg);
! 1933: } else if (fwdargs[2].ispath) {
! 1934: fwd->listen_host = xstrdup(fwdargs[0].arg);
! 1935: fwd->listen_port = a2port(fwdargs[1].arg);
! 1936: fwd->connect_path = xstrdup(fwdargs[2].arg);
! 1937: fwd->connect_port = PORT_STREAMLOCAL;
! 1938: } else {
! 1939: fwd->listen_host = NULL;
! 1940: fwd->listen_port = a2port(fwdargs[0].arg);
! 1941: fwd->connect_host = xstrdup(fwdargs[1].arg);
! 1942: fwd->connect_port = a2port(fwdargs[2].arg);
! 1943: }
1.135 djm 1944: break;
1945:
1946: case 4:
1.220 ! millert 1947: fwd->listen_host = xstrdup(fwdargs[0].arg);
! 1948: fwd->listen_port = a2port(fwdargs[1].arg);
! 1949: fwd->connect_host = xstrdup(fwdargs[2].arg);
! 1950: fwd->connect_port = a2port(fwdargs[3].arg);
1.135 djm 1951: break;
1952: default:
1953: i = 0; /* failure */
1954: }
1955:
1.202 djm 1956: free(p);
1.135 djm 1957:
1.168 stevesk 1958: if (dynamicfwd) {
1959: if (!(i == 1 || i == 2))
1960: goto fail_free;
1961: } else {
1.220 ! millert 1962: if (!(i == 3 || i == 4)) {
! 1963: if (fwd->connect_path == NULL &&
! 1964: fwd->listen_path == NULL)
! 1965: goto fail_free;
! 1966: }
! 1967: if (fwd->connect_port <= 0 && fwd->connect_path == NULL)
1.168 stevesk 1968: goto fail_free;
1969: }
1970:
1.220 ! millert 1971: if ((fwd->listen_port < 0 && fwd->listen_path == NULL) ||
! 1972: (!remotefwd && fwd->listen_port == 0))
1.135 djm 1973: goto fail_free;
1974: if (fwd->connect_host != NULL &&
1975: strlen(fwd->connect_host) >= NI_MAXHOST)
1976: goto fail_free;
1.220 ! millert 1977: /* XXX - if connecting to a remote socket, max sun len may not match this host */
! 1978: if (fwd->connect_path != NULL &&
! 1979: strlen(fwd->connect_path) >= PATH_MAX_SUN)
! 1980: goto fail_free;
1.176 djm 1981: if (fwd->listen_host != NULL &&
1982: strlen(fwd->listen_host) >= NI_MAXHOST)
1983: goto fail_free;
1.220 ! millert 1984: if (fwd->listen_path != NULL &&
! 1985: strlen(fwd->listen_path) >= PATH_MAX_SUN)
! 1986: goto fail_free;
1.135 djm 1987:
1988: return (i);
1989:
1990: fail_free:
1.202 djm 1991: free(fwd->connect_host);
1992: fwd->connect_host = NULL;
1.220 ! millert 1993: free(fwd->connect_path);
! 1994: fwd->connect_path = NULL;
1.202 djm 1995: free(fwd->listen_host);
1996: fwd->listen_host = NULL;
1.220 ! millert 1997: free(fwd->listen_path);
! 1998: fwd->listen_path = NULL;
1.135 djm 1999: return (0);
1.1 deraadt 2000: }
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